Improvement in grain-coolers



G. D. WOODWORTH.

Grain Cooler.

Patented July 3,- ,1866.

2 Sheets'Sheet 1i I 2 Sheets-Sheet 2.

G. D. WOODWORTH.

Grain Cooler.

No. 55,136. v Patented July 3, 1866.

UNITED STATES PATENT OFFICE.

GEORGE WOODWORTH, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN GRAlN-COOLERS.

Specification forming part of Letters Patent No. 56, 136, dated July 3,1866.

To all whom it may concern:

Be it known that I. GEORGE D. Woon- WORTH, of the city of Chicago, inthe county of Cook and State of Illinois, have invented a new method ofconstructing machinery whereby grain and other material is preventedfrom being heated while in the process of grinding; and I do herebydeclarethat the following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theannexed drawings, makinga part of this specification, in which Figure 1is aview of my improved machinery with portions of the curb and uppermillstone removed, showing a portion of the lower stone with the bailand eye. Fig. 2 is a view showing the curb entirely closed with thedischargespout already for use. Fig. 3 is a vertical sectional view ofthe feeding device, taken through the points N N, Fig. 1. View of thecenter portion of the upper stone.

The nature and object of my invention is to construct and apply tomillstones proper devices, so that air will be introduced into theeye-hole and forced through between the stones while said stones are inthe act of grinding, thus keeping the temperature in and between thestones at such a low degree as to secure an improved quality of flour.

I construct the millstones in the ordinary form and size and locate themwith respect to each other in the ordinary way. I surround themillstones with a curb made in the usual form. This curb is representedby B B, Fig. l.

A A is the top of the husk which supports the stones, and is made in theordinary way. 0 O is the upper stone with a portion taken away. Dis thelower stone. Fis the bail. E is the spindle upon which the bail F plays.

All of the above parts are made in the usual Fig. dis atop.

P is a leather boot, surrounding, and in which the lower end of, theouter tube, K, is

inserted, and passes down into the eye of the stone 0 O.

K and P form one and the same tube, the lower part of which is made ofleather. The leather part is called the boot, and is used to conform tothe vibrations of the stone.

L is ametallic band surrounding'the boot P, and by means of athumb-screw it is made to fit more or less closely. Its object is tofasten the boot P to the tube K.

N N is a metallic plate snugly and tightly fastened to the uppermillstone, O O, nearly covering that portion of the eye between the bootP and the stone. The inner edge of this metallic plate is turned so asto form a shoulder, as shown at m 00, Fig. 3.

O O is a ring, of hard and oil-soaked wood, surrounding the boot P andfitting closely to it and resting upon the shoulder 00 00.

Q is a slide, covering a hole in the metallic plate N N.

. S, Fig. 3, is the discharge-spout, through which the ground materialpasses. This spout is covered with bunting or some kind of openworkcloth. The surface-covering of this spout is broken or made withre-entering angles, so as to present as large surface as possible forthe escape of the air forced through between the stones, and both itssides and top are covered with bunting or some kind of open-work cloth.

T, Fig. 2, is a' spout connecting with a hole cut in the top of the curbB B, and extending into the spout S, to allow escape of air collectingbetween the stones and curb.

I do not confine myself to the covering of the discharge-spout in themanner spoken of as the only means of allowing the air to escape. I cancover the elevator or conveyer-case with the same material, and thusaccomplish the same result.

V is a hand-spout, used for the purpose of examining the meal, andconnected diagonally to spout S.

The operation of my invention is as follows: Motion is communicated tothe millstonesin the ordinaryway, and the grain is fed in the ordi; naryway. It being the object to keep a current of air passing between thestones during the process of grinding, it is accomplished as follows: Atany convenient and suitable point in the building a common blower islocated, and from this blower to the pipe I a tube is led, and throughwhich a strong current of air is forced, by means of the blower, throughpipes l, K,'and P into the eye of the stone, thence between the stones,where the grinding is performed. Thus a constant stream of coolatmospheric airis continually kept passing between the stones while thematerial is in the immediate act of being ground, and the temperature ofthe material is thus kept at the desired point. The spout S, Fig. 2,being covered with bunting or some kind of open-work cloth, ampleopportunity is offered for the escape of the air, while at the same timethe ground material passes into the proper receptacle for it, beingprevented from flying off in the form of dust by the open-clothcovering.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. Covering the eye of the stone to prevent the escape of the air, inthe manner described and substantially as set forth.

2. The use and employment of the ring 0 0, in the manner andsubstantially as set forth.

3. The combination of the pipes K and P, forming one and the same. pipe,in the manner and for the purpose set forth.

4. Covering the discharge-spout, conveyer, or elevator with bunting or asimilar material in such a way as to form a surface with one or morere-entering angles, in the manner and for the purpose set forth.

' 5. The combination of the spouts H, I, K, and P, in the manner and forthe purpose described.

6. The combination of the tubes H I K P and ring 0, in the manner andfor the purpose described.

7. The combination of the spouts K P and ring 0 with plate N N, in themanner and for the purpose described.

GEORGE D. WOODWORTEL.

Witnesses JAS. A. OoWLEs, JEROME WHEELER.

